1. I have a Tasks List

  2. A new calculated column added to it Task_ID

    a. Formula used -


It produces a column having values like TL_1, TL_2 .. and so on.

Now whenever anything changes in a list item (may be Task Status or anything else) the calculated column value changes to TL_

I have to goto the calculated column in the List Settings and hit OK button to re calculate the values.

How can I correct this auto update the values?

  • 1
    Known Issue, the ID column isn't supported in calculated columns, use a workflow/event receiver like Arvind says Commented Jul 7, 2016 at 4:10

1 Answer 1


The ID field you are trying to use in your Calculated Column is not known until the Item is saved . Hence using it in your calculated column may not give you the required output.You can use an event handler or a workflow to update the list items. My preference would be a simple workflow that runs when the items are created.

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